Патент USA US3065775код для вставки
Nov. 27, 1962 " J. M. c. YOUNG 3,065,765 DEVICE, FOR INTERMITTENTLY SUPPLYING LUBRICANTS Filed Dec. 4, 1961 / Shoe 1 3,065,765 DEVICE FOR INTERMITTENTLY SUPPLYHNG LUBRKCANTS John Michael Crispin Young, Solihull, England, assignor to Joseph Lucas (Industries) Limited, Birmingham, England 3,0?5,765 Patented Nov. 27, 1962 2 pistons 6, 12 presented to the chamber 2 are so chosen that the ?rst effect of the lubricant will be to move the piston 6 against its spring 7 until such movement is arrested by the shoulder 9. In this position the piston 6 covers the passage 15. The pressure in the chamber 2 now rises to a value suf?cient to move the piston 12 Filed Dec. 4, 1961, Ser. No. 156,679 Claims priority, application Great Britain Dec. 8, 196%) 1 Claim. (Ci. 137-62414) against the spring 13. The ?rst effect of this will be cant under pressure to a pump or other machine. drops and the piston 6 is moved by its spring 7 to main tain the pressure. However, when the passage 15 be to uncover the passage 15 and allow lubricant to ?ow into the latter. Further movement of the piston 12 un 10 covers the passages 16 and allows lubricant to be sup The object of this invention is to provide in a con plied to the machine or machines, As soon as the pas venient form means for intermittently supplying lubri sages 16 are uncovered the pressure in the chamber 2 Means in accordance with the invention comprises a chamber, ?rst and second bores extending from said tween the bores 5, It} is uncovered by piston 6, the chamber, ?rst and second pistons within said bores re pressure acting on the piston 12 drops and it is moved spectively and spring-loaded towards the chamber, means onto its seating 11, and the cycle is repeated. for supplying lubricant to the chamber, a passage ex A system in accordance with the invention may ‘be tending from the second bore and arranged to be nor used whenever it is required to supply lubricant inter mally covered by the second piston, but to be uncovered 20 mittently to a machine. One particular application of when the second piston is moved against its spring, said the example described is in the lubrication of the pumps passage communicating with the ?rst bore on the side employed in a reheat system of a gas turbine engine. of the ?rst piston remote from the chamber and being In this case the reheat system is not continuously in arranged to be covered by the ?rst piston when it is operation and in order to avoid waste of lubricant the moved against the action of its spring, and one or more 25 passage 15 is provided with a branch pipe 17 whfch further passages extending from the second bore and communicates with the source 3 through a normally adapted to communicate with said machine, the arrange open valve 18 which is closed by a solenoid 19 when ment being such that, in use, the ?rst piston is depressed the reheat system is operative. before the second piston. Having thus described my invention what I claim as The accompanying drawing is a sectional view illus 30 new and desire to secure by Letters Patent is: trating one example of the invention. 'Means for intermittently supplying lubricants under Referring to the drawing, there is provided a body 1 pressure to a machine and comprising a chamber, ?rst within which is de?ned a chamber 2 to which lubricant and second bores extending from said chamber, ?rst is supplied from a source 3 by a constant ‘delivery pump and second pistons within said bores respectively, ?rst 4. Extending from the chamber 2 is a ?rst bore 5 with 35 and second springs loading said pistons towards the cham in which is contained a piston 6. The piston 6 is loaded ber respectively, means for supplying lubricant to the by a spring 7 towards the chamber 2, whilst the end of chamber, a ?rst passage extending from the second bore the bore 5 remote from the chamber is connected to and arranged to be normally covered by the second the upstream side of the pump 4 through a pipe 8. Fur piston, but to be uncovered when the second piston is ther, the bore is stopped intermediate its ends to de?ne 40 moved against the action of the second spring, said ?rst a shoulder 9 serving to limit movement of the piston 6 passage communicating with the ?rst bore on the side against the action of its spring 7. of the ?rst piston remote from the chamber and being Also extending from the chamber 2 is a second bore arranged to be covered by the ?rst piston when it is 10 which is initially stepped to de?ne a truncated coni moved against the action of the ?rst spring, and a fur cal shoulder 11 between the chamber 2 and bore 10. ther passage extending from the second bore for com Within the bore 10 is a piston 12 which is loaded by a munication with said machine, said further passage being spring 13 towards the shoulder 11 and on its face pre arranged to be normally covered by the second piston, sented to the chamber 2 is provided with a half-ball valve 14 adapted to seat against the shoulder 11. Extending from the bore 10 is a passage 15 which communicates with the bore on the side of the piston 6 remote from the chamber 2. The passage 15 is nor mally closed by the valve 14. Also extending from the but to be uncovered when the second piston is moved against the action of the second spring after the ?rst passage is uncovered, the ratio of the effective areas of the ?rst and second pistons acted upon by pressure in the chamber being greater than the ratio of the forces exerted on the pistons by the ?rst and second springs bore 10 are passages 16 which communicate with the machine or machines to which lubricant is to be sup~ 55 respectively, so that the ?rst piston is depressed before the second piston as the pressure in the chamber in— plied. In operation, when the pump 4 is started, lubricant is supplied to the chamber 2. The relative areas of the creases. " No references cited.